/* ============================================================
   OcularAI v2.0 — Global Stylesheet
   Palette: #050B18 bg | #00D4FF cyan | #7C3AED purple | #06FFA5 mint
   Fonts:   Space Grotesk (headings) + Inter (body)
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Inter:wght@300;400;500;600&display=swap');

/* ── CSS VARIABLES ─────────────────────────────────────────── */
:root {
  --bg-deep:      #050B18;
  --bg-mid:       #0A1628;
  --bg-surface:   #0F1F38;
  --cyan:         #00D4FF;
  --purple:       #7C3AED;
  --mint:         #06FFA5;
  --amber:        #FFB800;
  --red:          #FF3B3B;
  --text-primary: #E8F4FD;
  --text-muted:   #6B8BA4;
  --glass-bg:     rgba(15, 31, 56, 0.72);
  --glass-border: rgba(0, 212, 255, 0.14);
  --blur:         blur(14px);
  --r-lg:         16px;
  --r-md:         10px;
  --glow:         0 0 40px rgba(0, 212, 255, 0.10);
}

/* ── RESET ─────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', -apple-system, sans-serif;
  background: var(--bg-deep);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ── PARTICLE CANVAS ──────────────────────────────────────── */
#particle-canvas {
  position: fixed;
  inset: 0;
  width: 100%; height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.55;
}

/* ── LAYOUT ──────────────────────────────────────────────── */
.app-container {
  position: relative;
  z-index: 1;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 1.25rem 5rem;
}

/* ── HEADER ──────────────────────────────────────────────── */
.site-header { text-align: center; padding: 3.5rem 1rem 2.25rem; }

.logo-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background: rgba(0,212,255,0.07);
  border: 1px solid rgba(0,212,255,0.18);
  border-radius: 50px;
  padding: 0.3rem 1rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 1.25rem;
}
.logo-badge .dot {
  width: 6px; height: 6px;
  background: var(--mint);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

.site-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(2.5rem, 7vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.08;
  background: linear-gradient(135deg, var(--cyan) 0%, var(--purple) 55%, var(--mint) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1rem;
}

.site-subtitle {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 510px;
  margin: 0 auto;
  line-height: 1.65;
}

/* ── GLASS CARDS ─────────────────────────────────────────── */
.glass-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border-radius: var(--r-lg);
  box-shadow: var(--glow);
  padding: 1.75rem;
  margin-bottom: 1.4rem;
  transition: border-color .25s, box-shadow .25s;
}
.glass-card:hover {
  border-color: rgba(0,212,255,0.26);
  box-shadow: 0 0 56px rgba(0,212,255,0.16);
}

/* ── TABS ────────────────────────────────────────────────── */
.tabs-nav {
  display: flex;
  gap: 0.35rem;
  background: rgba(10,22,40,0.85);
  border: 1px solid var(--glass-border);
  border-radius: 50px;
  padding: 0.28rem;
  margin-bottom: 1.9rem;
  overflow-x: auto;
  scrollbar-width: none;
}
.tabs-nav::-webkit-scrollbar { display: none; }

.tab-btn {
  flex: 1;
  min-width: max-content;
  padding: 0.58rem 1.05rem;
  border: none; background: transparent;
  color: var(--text-muted);
  font-family: 'Inter', sans-serif;
  font-size: 0.84rem; font-weight: 500;
  cursor: pointer; border-radius: 40px;
  transition: all .2s ease;
  white-space: nowrap;
}
.tab-btn:hover { color: var(--text-primary); }
.tab-btn.active {
  background: linear-gradient(135deg, rgba(0,212,255,0.13), rgba(124,58,237,0.13));
  color: var(--cyan);
  border: 1px solid rgba(0,212,255,0.18);
}

.tab-panel { display: none; }
.tab-panel.active { display: block; animation: fadeIn .3s ease; }

/* ── METRICS GRID ────────────────────────────────────────── */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
  margin-bottom: 1.4rem;
}
.metric-card {
  background: rgba(10,22,40,0.92);
  border: 1px solid var(--glass-border);
  border-radius: var(--r-md);
  padding: 1.2rem;
  text-align: center;
}
.metric-value {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 2rem; font-weight: 700;
  color: var(--cyan); line-height: 1;
}
.metric-label {
  font-size: 0.73rem; color: var(--text-muted);
  margin-top: 0.4rem;
  text-transform: uppercase; letter-spacing: .05em;
}

/* ── FORMULA BOX ────────────────────────────────────────── */
.formula-box {
  background: rgba(124,58,237,0.08);
  border: 1px solid rgba(124,58,237,0.22);
  border-radius: var(--r-md);
  padding: 1.1rem 1.5rem;
  font-family: 'Space Grotesk', monospace;
  font-size: 1.3rem;
  text-align: center;
  color: var(--mint);
  margin: 1rem 0;
  letter-spacing: .03em;
}

/* ── SECTION TEXT ───────────────────────────────────────── */
.section-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.22rem; font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.55rem;
}
.section-title span { color: var(--cyan); }
.section-body {
  color: var(--text-muted);
  font-size: 0.93rem; line-height: 1.72;
}

/* ── SEVERITY BADGES ────────────────────────────────────── */
.severity-badge {
  display: inline-block;
  padding: .25rem .75rem;
  border-radius: 20px;
  font-size: .78rem; font-weight: 600;
  letter-spacing: .04em;
}
.severity-normal   { background:rgba(6,255,165,.1);  color:var(--mint);  border:1px solid rgba(6,255,165,.28); }
.severity-mild     { background:rgba(255,184,0,.1);  color:var(--amber); border:1px solid rgba(255,184,0,.28); }
.severity-moderate { background:rgba(255,100,50,.1); color:#FF6432;      border:1px solid rgba(255,100,50,.28);}
.severity-high     { background:rgba(255,59,59,.1);  color:var(--red);   border:1px solid rgba(255,59,59,.28); }

/* ── CHART WRAPPER ──────────────────────────────────────── */
.chart-wrapper { position: relative; height: 270px; margin: 1rem 0; }

/* ── CAMERA TAB ─────────────────────────────────────────── */
#camera-video-container {
  position: relative;
  width: 100%; max-width: 480px;
  margin: 0 auto;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--glass-border);
  background: #000;
  aspect-ratio: 4/3;
}
#camera-video {
  width: 100%; height: 100%;
  object-fit: cover;
  transform: scaleX(-1);
  display: block;
}
#camera-canvas-overlay {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  transform: scaleX(-1);
  pointer-events: none;
}

.camera-result-panel {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 1rem;
  margin-top: 1.2rem;
}
.live-metric {
  background: rgba(10,22,40,0.95);
  border: 1px solid var(--glass-border);
  border-radius: var(--r-md);
  padding: 1rem; text-align: center;
}
.live-value {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.75rem; font-weight: 700;
  color: var(--cyan);
  transition: color .35s;
}
.live-value.warning { color: var(--amber); }
.live-value.danger  { color: var(--red);   }
.live-label {
  font-size: .7rem; color: var(--text-muted);
  margin-top: .25rem;
  text-transform: uppercase; letter-spacing: .06em;
}

/* Camera buttons */
.cam-btn {
  display: inline-flex; align-items: center; gap: .45rem;
  padding: .68rem 1.4rem;
  border: none; border-radius: 8px;
  font-family: 'Inter', sans-serif;
  font-size: .88rem; font-weight: 600;
  cursor: pointer; transition: all .2s;
}
.cam-btn-primary {
  background: linear-gradient(135deg, var(--cyan), var(--purple));
  color: #fff;
}
.cam-btn-primary:hover { opacity:.86; transform:translateY(-1px); }
.cam-btn-secondary {
  background: rgba(0,212,255,.08);
  color: var(--cyan);
  border: 1px solid rgba(0,212,255,.22);
}
.cam-btn-secondary:hover { background: rgba(0,212,255,.15); }

/* ── CALIBRATION OVERLAY ────────────────────────────────── */
#calibration-overlay {
  position: fixed; inset: 0;
  background: rgba(5,11,24,0.96);
  z-index: 200;
  display: flex; align-items: center; justify-content: center;
  padding: 1rem;
}
.calibration-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: var(--blur);
  border-radius: var(--r-lg);
  padding: 2.4rem;
  max-width: 460px; width: 100%;
  text-align: center;
}
.calibration-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.45rem; font-weight: 700;
  color: var(--cyan); margin-bottom: .7rem;
}
.calibration-desc {
  color: var(--text-muted);
  font-size: .89rem; line-height: 1.65;
  margin-bottom: 1.7rem;
}

#card-rect-wrapper {
  display: flex; justify-content: center;
  height: 70px; align-items: center;
  margin-bottom: .5rem;
}
#card-rect {
  height: 54px; width: 200px;
  background: transparent;
  border: 2px solid var(--cyan);
  border-radius: 6px;
  box-shadow: 0 0 18px rgba(0,212,255,0.2);
  position: relative;
  transition: width .04s;
}
#card-rect::after {
  content: '85.6 mm';
  position: absolute; bottom: -20px;
  left: 50%; transform: translateX(-50%);
  font-size: .68rem; color: var(--text-muted);
  white-space: nowrap;
}
.calib-slider {
  width: 100%; margin: 1.5rem 0 .5rem;
  accent-color: var(--cyan);
}

/* ── FRAME PROGRESS ─────────────────────────────────────── */
.frame-progress {
  height: 3px; background: rgba(0,212,255,0.1);
  border-radius: 2px; overflow: hidden;
}
.frame-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--mint));
  border-radius: 2px; transition: width .12s;
}

/* ── FOOTER ─────────────────────────────────────────────── */
.site-footer {
  text-align: center; padding: 2rem 1rem;
  color: var(--text-muted); font-size: .78rem;
  border-top: 1px solid rgba(0,212,255,.07);
  margin-top: 3rem;
}

/* ── ANIMATIONS ─────────────────────────────────────────── */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(7px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: .45; transform: scale(.8); }
}

/* ── RESPONSIVE ─────────────────────────────────────────── */
@media (max-width: 600px) {
  .camera-result-panel { grid-template-columns: 1fr 1fr; }
  .metrics-grid        { grid-template-columns: 1fr 1fr; }
  .calibration-card    { padding: 1.75rem 1.2rem; }
  .formula-box         { font-size: 1.05rem; }
}